Netflow is a versatile feature allowing customers to monitoring traffic flows for the purpose of billing, network planning, or security purposes. The NetFlow Services Card support per packet, statistics capture in hardware for flow-based and VLAN-based statistics monitoring. NetFlow services capture and cache detailed information about each data flow (a stream of packets traveling in one direction from one endpoint to another across the network). Data in the NetFlow cache includes information with regard to specific flows including details such as IP addresses, packet and byte counts, timestamps, and application ports. This data can then be exported, collected, and analyzed for numerous purposes such as virus and denial of service mitigation.
- The NetFlow Services Card is supported only on the Supervisor Engine IV and V with Cisco IOS Software and is not supported in the Cisco CatOS Software